| SAStromberg Allen & CO | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
 Sun Chemical | Chicago | IL | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| SGSuperior Graphite CO | Chicago | IL | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| SMSuperior Manufacturing Group INC | Chicago | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| TFTag Furnishings Group | Chicago | IL | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| TSTempel Steel Company LLC | Chicago | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| TCTennant Coatings INC | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| TMTerrell Materials CORP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TMTerrell Materials CORP | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TOThe Original Instant Printing | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TITin INC D/b/a Temple - Inland | Chicago | IL | Paper Manufacturing322213 | — | ◇ UNVERIFIED |
| TLTrans Load | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| TPTribune Properties INC | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| TVTrue Value Manufacturing CO | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| UIUgn INC | Chicago | IL | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| UPUnion Pacific Railroad | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| UPUnion Partners Upx CORP Dba Lamination Specialities CORP LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| UAUnited American Metal | Chicago | IL | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| UMUnited Metal Finishers | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| UDUS Diecasting INC | Chicago | IL | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| UMUS Motor Recycling | Chicago | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| USUS Steel - Gary Works | Chicago | IL | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| VPVcna Prairie Illinois Building Materials LLC Yard 1007 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| VPVcna Prairie Illinois INC P118 | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| VBVienna Beef | Chicago | IL | Food Manufacturing311611 | — | ◇ UNVERIFIED |
| VIVision Integrated Graphics LLC | Chicago | IL | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| VDVj Dolan & CO INC | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| VAVp Anodizing | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| VPVp Plating | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| WFWagner Foundry INC | Chicago | IL | Primary Metal Manufacturing331529 | — | ◇ UNVERIFIED |
| WMWaste Management of Il./cid Transfer Sta | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WRWelsch Ready Mix Plant | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| WSWesco Spring CO | Chicago | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| WPWestrock Packaging Systems LLC | Chicago | IL | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| WCWeyerhaeuser CO | Chicago | IL | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| WYWilliam Yuenger Manufacturing CO | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| WEWm E Wright CO | Chicago | IL | Miscellaneous Manufacturing339993 | — | ◇ UNVERIFIED |
| WCWood Creations INC | Chicago | IL | Furniture and Related Product Manufacturing337211 | — | ◇ UNVERIFIED |
| WFWorlds Finest Chocolate INC | Chicago | IL | Food Manufacturing311320 | — | ◇ UNVERIFIED |
| WPWrico Packaging | Chicago | IL | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| WMWrigley Manufacturing Company | Chicago | IL | Food Manufacturing311340 | — | ◇ UNVERIFIED |
| WNW-z Nma Office Owner Viii LLC | Chicago | IL | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| YPYale Polishing & Plating | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| ZIZarco Industries INC | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| ZLZf Lemforder | Chicago | IL | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| 1O100 - Ozinga Rmc, Chicago Division | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| 1N120 Northside Yard | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| 16130 - 64th Street Yard | Chicago | IL | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| AAA & a Logistics and Supplies Inc., | Chicago | IL | Fabricated Metal Product Manufacturing332722 | — | ◐ LIKELY ACTIVE |
| A3ACH-CHGO 31st | Chicago | IL | Food Manufacturing311340 | 100-499 | ◐ LIKELY ACTIVE |
